imapfilter/imapfilter/tty.c

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <termios.h>

#include "config.h"
#include "imapfilter.h"


extern unsigned int flags;

static struct termios otio, ntio;       /* Original and new tty settings. */


/*
 * Store original term attributes.
 */
int
tty_store(void)
{
        if (isatty(fileno(stdin)))
                flags |= FLAG_TTY;

        if (tcgetattr(fileno(stdin), &otio)) {
                error("getting term attributes; %s\n", strerror(errno));
                return ERROR_TERMIO;
        }
        return 0;
}


/*
 * Disable echo.
 */
int
tty_disable_echo(void)
{
        if (!(flags & FLAG_TTY))
                return 0;

        ntio = otio;
        ntio.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);

        flags |= FLAG_TTY_MODIFIED;

        if (tcsetattr(fileno(stdin), TCSAFLUSH, &ntio)) {
                error("setting term attributes; %s\n", strerror(errno));
                return ERROR_TERMIO;
        }
        return 0;
}


/*
 * Restore original term attributes.
 */
int
tty_restore(void)
{
        if (!(flags & FLAG_TTY) || !(flags & FLAG_TTY_MODIFIED))
                return 0;

        if (tcsetattr(fileno(stdin), TCSAFLUSH, &otio)) {
                error("setting term attributes; %s\n", strerror(errno));
                return ERROR_TERMIO;
        }
        flags &= ~(FLAG_TTY_MODIFIED);

        return 0;
}
1	#include <stdio.h>
2	#include <unistd.h>
3	#include <string.h>
4	#include <errno.h>
5	#include <termios.h>
6
7	#include "config.h"
8	#include "imapfilter.h"
9
10
11	extern unsigned int flags;
12
13	static struct termios otio, ntio; /* Original and new tty settings. */
14
15
16	/*
17	* Store original term attributes.
18	*/
19	int
20	tty_store(void)
21	{
22	if (isatty(fileno(stdin)))
23	flags \|= FLAG_TTY;
24
25	if (tcgetattr(fileno(stdin), &otio)) {
26	error("getting term attributes; %s\n", strerror(errno));
27	return ERROR_TERMIO;
28	}
29	return 0;
30	}
31
32
33	/*
34	* Disable echo.
35	*/
36	int
37	tty_disable_echo(void)
38	{
39	if (!(flags & FLAG_TTY))
40	return 0;
41
42	ntio = otio;
43	ntio.c_lflag &= ~(ECHO \| ECHOE \| ECHOK \| ECHONL);
44
45	flags \|= FLAG_TTY_MODIFIED;
46
47	if (tcsetattr(fileno(stdin), TCSAFLUSH, &ntio)) {
48	error("setting term attributes; %s\n", strerror(errno));
49	return ERROR_TERMIO;
50	}
51	return 0;
52	}
53
54
55	/*
56	* Restore original term attributes.
57	*/
58	int
59	tty_restore(void)
60	{
61	if (!(flags & FLAG_TTY) \|\| !(flags & FLAG_TTY_MODIFIED))
62	return 0;
63
64	if (tcsetattr(fileno(stdin), TCSAFLUSH, &otio)) {
65	error("setting term attributes; %s\n", strerror(errno));
66	return ERROR_TERMIO;
67	}
68	flags &= ~(FLAG_TTY_MODIFIED);
69
70	return 0;
71	}